The correct answer is A) Muziris.
Muziris was an ancient port city on the Malabar Coast of India, located in present-day Kerala. It was one of the most important ports in the Indian Ocean during the Sangam Age (3rd century BCE to 3rd century CE). The city was a major center of trade and commerce, and it was also a major cultural and religious center. Muziris was destroyed by a tidal wave in the 14th century, but its ruins have been excavated and are now a popular tourist destination.
Kochi, Kannur, and Kollam were also important port cities during the Sangam Age, but they were not as important as Muziris. Kochi is located on the Arabian Sea coast of Kerala, and it was a major center of trade and commerce. Kannur is located on the Malabar Coast of Kerala, and it was a major center of trade and commerce. Kollam is located on the Arabian Sea coast of Kerala, and it was a major center of trade and commerce.
The Sangam Age was a period of great cultural and economic prosperity in India. It was a time of great literary and artistic achievement, and it was also a time of great economic growth. The Sangam Age was a time of great trade and commerce, and it was also a time of great religious and cultural exchange.